Blast-furnace.



EDWARD B. COOK, F POTTSTOWN, PENNSYLVANIA.

BLAST-FURNACE.

Specification of Letters Patent.vv

Application led .Tuly 1, 1909. Serial No. 505,374.

Pottstown, in the county of Montgomery and State of Pennsylvania, haveinvented new and useful Improvements -in Blast- I Furnaces, of which thefollowing is a specif fication.

This linvention relates to improvement-s 1n blast furnaces and moreparticularly to the construction of the top of the' furnace.

In supplying the stock to the furnace it is` customary to deposit thesame first in a hopper arranged above the top of the furnace. To evenlydistribute the contents of the hopper within the furnace the bottom isclosed by a conical bell. When the bell is lowered the stock will bedischarged from the hopper and the conical sides of the bell willdeflect the stock so that it strikes the sides of the furnace. It hasbeen found that the continual impact of the stock upon the upper sidesof the furnace has a deteriorating effect and will in time wear away thelining.

It is the object of this invention to vprovide a protection for thelining at this point of the furnace which will not be affected by theheat and peculiar properties of the furnace'gases, as well as resist thecontinual concussion caused by the impact of the stock from the hopper.

While the preferred form of this invention is illustrated upon the accomanying sheet of drawing, yet it is to be unt erstood that minor detailchanges may be made without departing from the scope thereof.

Figure 1 is a vertical section taken through the center of the uBperport-ion of a blast furnace to which this'invention has been applied.Fig. 2 is a perspective view of a detail. l

Fig. 1 illustrates the top of a blast furnace provided with the usualhopper l and bell 2. Vhen the bell is lowered the stock will bedeflected outward against the inner Walls of the furnace. This inventionprovides for a series of small plates 3 arranged in parallel rows aroundthe inner lining of the walls about the point of impact. The innerlining'4 from the lowermost point of this protection or armor to the topof the furnace is composed of fire bricks set in {i1-e clay or cement.For reasons hereinafter stated this portion of the lining 4 is composedof one thickness of brick and to prevent the same from4 being crumbledor displaced by the falling of the stock thereon, a backing of concrete5 is provided.

Fig. 2 is an enlarged view of one of the plates 3 :forming theprotective belt. As seen this plate consists ofa rectangular body 6provided with an elongated projection 7 extending at'right-anglesthereto.- These plates are mounted between the layers of tire brick inthe lining 4, in the manner shown in Fi 1, ,gith the elongatedprojections 7 exten( ing between the bricks. To anchor the plates inplace it is preferable that the projections extend through the tirebrick and into the concrete' backing 5, as shown in Fig. l. Each plate 3in each series may be se cured in this manner, or every other plate maybe anchored in the concrete, While the projections on the alternateplates extend only between the fire bricks. To provide an additionalanchor for the plate, the projections which extend in the concrete maybe split at their inner ends and bent vaway from each other as shown indotted lines in Fig. 2. The protecting plates are subjected' not only tothe greatstrain occurred by the' contact of the stock continuallyfalling 'u on the saine, but are also subjected to the e ect ofthefurnace gases.y By arranging a series of small plates spaced apart fromeach other as shown, sufficient allowance is made fo'` Patented Oct. 12,1909. f

expansion, contraction, or twisting of the plate caused by. theexcessive heat without affecting the general structure.

It has been found that high carbon steel is the only material that willsuccessfully resist the. peculiar action of the hot furnace gases. Lowcarbon steel and cast iron which are the available metals for thispurpose under the great heat at this point in the furnace, will absorbcarbon from the gases and cause this material to Swell and dislntegrate.It is therefore very important that these plates be made of the highestform of carbon steel that can be rolled in the mills. i

Considering the diiiiculties confronting n protective lining to theinner walls of the furnace at this point, the advantages of thisinvention will be readily appreciated. By constructing this part of theinner Wall of one thickness of fire brick with a backing of concrete ananchorage is formed for the plates, which not only secures the plateslin position but also retains the fire brick lining.

The construction of the plates of high car-1110 bon steel, each platepresenting by itself but a. i small surface upon the interior of thefurplate.

nace, and by spacing the plates apart and arranging then1 in staggeredrows the hot furnace gases or the falling stock gases will have littleor no effect upon any separate The life of the furnace is greatlyprolonged by the protective lining, the other advantages of thisconstruction are obvious.

What I claim is 1. In a blast furnace, a protection for the inner liningthereof comprising a series of segregated plates carried thereby andcovering a portion thereof.

2. In a blast furnace, a protection for the inner' lining and extendingover ay portion thereof, comprising a series of high carbon steelplates,

3. Ina blast furnace, a protection for the inner Walls thereofcomprising a brick lining, a series of segregated plates on the innersurface and means for securing the saine between the layers of bricksforming the lining.

4. In a blastl furnace, a protection for the inner Walls thereofcomprising a brick lining, a concrete backing therefor, a series ofplates `covering a portion of the inner surface of the lining anchoredin the concrete backing. i

5. In a blast furnace, a protection for the inner Walls thereofcomprising a brick lining, a concrete backing therefor and a series ofplates covering a portion of the inner sur,4 face of the lining andsecuring the lining againstthe backing.

t3. In a blast furnace, a protectionfor the inner walls thereofcomprising a brick lining, a concrete backing therefor, a series ofplates on the inner surface having a projection passing through thelining and' anchored in the backing. l

7. In a blast furnace, a protection for the inner walls thereofcomprising a brick lining, a concrete backing therefor and a series ofplates having a flat surface engaging the inner Walls of the lining, anda projection passing through the lining into the backing provided at theextremity thereof with a projecting anchor.

8. ln a blast furnace, a plate presenting a contact surface lhaving anintegral anchorving' ineinbcr.

9.111 a blast, furnace, a protect-ion upon the interior adapted toreceive the `nnpact 'of the stock from the hopper consisting .of

segregated Contact plates secured about the surface of the innerwalls inparallel series, the plates in the adjacent series being arranged instaggered relation to each other. EDVARI) B. COOK. lV i tnesses PAUL S.KUL?, H. V. HALLMAN.

